Maxitrol M520-3/4 Modulator Valve

Modulator Valve; Nominal Size 3/4 Inch; End Connection Female Threaded x Female Threaded; End to End Distance 3.4 Inch; Temperature Rating -40 to 125 Deg F; Pressure Rating 1/2 PSI (Inlet), 2.5 PSI (Emergency Exposure Limit); Application Atmospheric, Infrared and Direct Fired Burner; Applicable Standard UL/CSA (Canada and US); Gas Type Natural, Mixed Gas, Liquefied Petroleum Gas and LP Gas Air Mixture; Vent Pipe Connection 1/8 Inch Threaded 12A06 Installed; Swing Radius 4.3 Inch; Size 3.25 Inch Width x Height 5.3 Inch